/Engine/Plugins/Runtime/nDisplay/Source/DisplayCluster/Public/Render/Projection/IDisplayClusterProjectionPolicy.h
Send projection policy game thread data to render thread proxy called once per frame from FDisplayClusterViewportManager::FinalizeNewFrame
virtual void UpdateProxyData ( [IDisplayClusterViewport](API\Plugins\DisplayCluster\Render\Viewport\IDisplayClusterViewport) * InViewport )